package org.openfantasia.musica.instruments.jmusic;

import jm.audio.io.SampleOut;
import jm.audio.synth.*;

/**
 * A basic synthesis instrument implementation
 * which with a triable envelope.
 *
 * @author Andrew Brown
 */

public final class SlowSineInst extends jm.audio.Instrument {
	//----------------------------------------------
	// Attributes
	//----------------------------------------------

	/**
	 * The points to use in the construction of Envelopes
	 */
	private EnvPoint[] pointArray = new EnvPoint[10];

	/**
	 * The number of channels
	 */
	private int channels;

	/**
	 * the sample rate passed to the instrument
	 */
	private int sampleRate;

	//----------------------------------------------
	// Constructor
	//----------------------------------------------


	/**
	 * Basic default constructor to set an initial
	 * sampling rate.
	 *
	 * @param sampleRate
	 */
	public SlowSineInst(int sampleRate) {
		this(sampleRate, 2);
	}


	/**
	 * A constructor to set an initial
	 * sampling rate and number of channels.
	 *
	 * @param sampleRate
	 */
	public SlowSineInst(int sampleRate, int channels) {
		this.sampleRate = sampleRate;
		this.channels = channels;
		EnvPoint[] tempArray = {
				new EnvPoint((float) 0.0, (float) 0.0),
				new EnvPoint((float) 0.5, (float) 1.0),
				new EnvPoint((float) 1.0, (float) 0.0)
		};
		pointArray = tempArray;
	}

	//----------------------------------------------
	// Methods 
	//----------------------------------------------


	/**
	 * Initialisation method used to build the objects that
	 * this instrument will use
	 */
	public void createChain() {
		Oscillator wt = new Oscillator(this, Oscillator.SINE_WAVE,
				this.sampleRate, this.channels);
		Envelope env = new Envelope(wt, pointArray);
		Volume vol = new Volume(env);
		StereoPan span = new StereoPan(vol);
		SampleOut sout = new SampleOut(span);
	}
}

